One transparent source
The scheduled updater requests the ETH-USD ticker from the Coinbase Exchange public API. The displayed value is its last trade price in US dollars, with the exchange’s trade timestamp. It is not an average across exchanges, an investment forecast, or a promise of execution.
Freshness and failure
The job runs every five minutes. Responses must include a finite positive price and a recent valid timestamp. A successful result replaces the cache atomically. Failed requests preserve the previous valid quote. The application marks a quote stale after 15 minutes and shows an unavailable state when no usable cache exists.
View the latest cached ETH/USD quote with its trade timestamp and freshness status.
Calculator scope
The gas fee calculator uses gas units multiplied by effective gas price in gwei, divided by one billion. It does not predict gas usage, recommend a bid, or include network-specific L2 data fees.
Coinbase Exchange ticker documentation
Check whether the quote answers your question
Trade time matters more than page load time
Reloading the price page does not force a new exchange trade or an immediate data fetch. Read the trade timestamp and the stale-data label. A recent page load can still show an older quote.